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问题
多项选择题
下井人员必须佩戴以下哪些物品?()
A.自救器
B.矿灯
C.安全帽
D.所用工具
答案
参考答案:
A, B, C
判断题
看图,读句子或对话,与图意相符的在括号中打“√”,不符的打“×”。
( )1. The ruler is in the box.
( )2. The elephant is big. The mouse is small.
( )3. She likes rice.
( )4. I can see four apples and three pears.
( )5. — Is she your mother?
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名词解释
压缩比
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